5. - 6. gyakorló feladat megoldása tovább
5) | 9 | – | 5 | = | + | 4 | 6) | – | 5 | + | 5 | = | 0 | ||||||||||
– | 7 | + | 8 | = | + | 1 | – | 2 | – | 1 | = | – | 3 | ||||||||||
– | 5 | + | 3 | = | – | 2 | – | 7 | + | 3 | = | – | 4 | ||||||||||
– | 8 | + | 1 | = | – | 7 | – | 1 | + | 0 | = | – | 1 | ||||||||||
– | 6 | + | 6 | = | 0 | – | 5 | + | 7 | = | + | 2 |